Electric lamp



(No Model.)

W. P. JOBBINS.

ELECTRIC LAMP.

. Patented Jan.16,.1883.

f/GZ.

QW W

UNITED STATES PATENT OEEICE.

ELECTRIC LAMP.

SPECIFICATION forming part of Letters Patent No. 270,806, dated January 16, 1883. Application lod October 16, 1882. (No model.)

To all whom yit may concern:

Be it known that I, WILLIAM F. J OEEINs, a citizen ot' the United States, and a resident of East Orange, Essex county, New Jersey, have invented an Improvement in Electric Lamps,

ot which the following is a specification.

The main object of my invention is to so construct an electric lamp as to prevent the red-hot particles given ott' by the carhons when ignited from escapingfrom the lamp and doing damage by setting tire to combustible material near the lamp; aud this object Iattain by providing a transparent receptacle below theopen bottom of the ordinary' globe, which receptacle preferably contains water to extinguish the ignited particles, and at the same time not intertere with the rays of -light downward from the carbons.

In 'the accompanying drawings, Figure l is a side view o t' my improved lamp, and Fig. 2 a sectional view of a modification.

My invention may be applied to almost any of the different forms of electric lamps provided with globes more or less open at the bottom, and in the drawings I have shown it as applied to a well-known form of lamp, in which A is the upper cross-bar of the lampframe, carrying the feeding and regulating devices It for the movable carbon-holder B.

D D' are the vertical side bars, and E the lower cross-bar, which carries the stationary carbon-holding tube H. On this tube H is tixed the support F for the globe G, within which the carbons burn.

Immediately below the bottom of the globe I arrange a cup-shaped receptacle, M, ot glass or other suitable transparent material capable of holding a liquid.

'In some cases the cross-bar E maybe made of glass, and the receptacle M made in one piece therewith or directly secured thereto, as indicated in Fig. I; and I also prefer to make the electrical connection between the holder H of the negative carbon and the exit binding-post s through the medium of an insulated wire passing, as shown bydotted lines, through the interior of the side bar, D, and the crosspiece E, which are both made hollow or grooved for that purpose, so that neither of the side bars, D D, which are so often laid hold of, shall be in the circuit. Another advantage ot' making the cross-bar Eas well as the receptacle M of transparent material is that in such case the downward rays of light from the carbons are interfered with to the smallest extent possible with such a form of lamp. In some cases the side bars, D D', also may be made of glass or other transparent material.

Insteadof securing the receptacle M to the cross-piece E, it may be secured to the holder H by providingthe receptacle with a threaded thim ble adapted to a screw-thread on the holder H, as shown in Fig. 2, the receptacle being retained at the desired height by ajam-nut, n. I- prefer to provide the receptacle with a valved outlet, on, for the liquid.

I am aware that electric lamps have heretofore been so constructed as to prevent the escape of the redhot particles of carbon from the lamp, and I therefore do not desire to claim such a construction, broadly; but

I claim as my invention- 1. The combination of the globe ot' an electric lamp, having an opening at the lower end, with a receptacle, M, immediately below said opening.

2. The combination ot the globe of an electric lamp, havingan opening' at the lower end, with awater-receptacle, M, of transparent material, below said opening.

3. An electric lamp having a globe open at the lower end, a transparent water-receptacle, M, and transparent lower cross-bar, E.

4. An electric-arc-lamp frame havingits side bars made of transparent non-conducting material, as and i'or the purpose set t'orth.

5. An electrc-arc-lamp frame havingits side bars and bottom piece made ot' transparent non-conducting material, substantially as andV for the purpose set forth.

In testimony whereofl I have signed my name to this specification in the presence of two subscribing witnesses.

VILLIAM F. JOBBINS.

Witnesses WARREN P. FREEMAN, SAMUEL M. QUINN. 

